A train having length 330 metres takes 11 seconds to cross a 550 metres long bridge. How much time will the train take to cross a 570 metres long bridge?
Answer & explanation
Correct answer: option 1
Speed of the train = $\frac{distance}{time}$
= $\frac{330+550}{11}$
= 80 m/s
Time taken by train to cross 570 metres bridge = $\frac{distance}{speed}$
= $\frac{330+570}{80}$ = $\frac{900}{80}$
= (45/4) seconds